NO. 1704. A COLLECTION OF SHELLS FROM PERU—DALL. 157 



CARDIUM PROCERUM Sowerby. 



Cardium procerum Sowerby, Proc. Zool. Soc. of London for 1833, p. 83; Conch. 

 111., vol. 1, 1840, pi. 50, fig. 23. 

 A fragment was collected at the island Lobos de Afuera. 



Distribution. — Cedros Island, Lower California, south to Paita, 

 Peru. 



Only a fragment was collected, and it is ])robably rare on the 

 Peruvian coast. 



DOSINIA DUNKERI Philippi. 



Cytherea dunkeri Philippi, Abb. und Beschr. neue Conch., vol. 1, 1844, p. 4, 

 pi. 2, fig. 9. — Sowerby, Thes. Conch., Artemis, jil. 140, fig. 5. 

 From a tidal lagoon at La Boca Grande, Tumbes. 



Distribution. — Head of the Gulf of California and southward to 

 Tumbes, Peru, and the Galapagos Islands. 



Shell suborbicular, rather tumid, strong, and glossy, of a yellow- 

 ish-white color, with moderately distant concentric sulci, the inter- 

 spaces almost lamellar at the extremities of the shell; a few radiating 

 very feeble strife near the ends of the shell; lunule sunken, cordate; 

 beaks not prominent; the greatest length is on a vertical line from 

 the beaks. 



The soft parts are small for the size of the shell and, though eaten 

 by the natives of the Gulf of California, the shell is not sufficiently 

 common to have an economic value. 



TIVELA PLANULATA Broderip and Sowerby. 

 Plate 28, fig. 9. 



Cytherea planulata Broderip and Sowerby, Zool. Journ., vol. 5, 1829, p. 48. — 

 Sowerby, Thes. Conch. Cytherea, 1851, pi. 127, fig. 13. 

 Matacaballa, Sechura Bay. 



Distribution. — Gulf of California and southward to Coquimbo, 

 Chile. 



MACROCALLISTA (PARADIONE) PANNOSA Sowerby. 



Cytherea pannosa Sowerby, Proc. Zool. Soc. of London for 1835, p. 47; Thes. 

 Conch., 1851, pi. 133, figs. 140-142; pi. 163, figs. 202-203. 

 Dredged in Sechura Bay, west of Matacaballa, in about 5 fathoms. 



Distribution. ^-Qq.\)Q St. Lucas, Lower California, southward to 

 Valparaiso, Chile. 



Shell small, polished, compressed, obovate, solid, smooth, yellow- 

 ish, variously painted with brown lines, spots, or streaks; beaks 

 rather prominent; the interior of the shell white, the margins entire. 



This little shell in some localities is quite common; in the Gulf of 

 California the dead valves occur in heaps on the beaches, but it is 

 too small to have any economic value, averaging only about an inch 

 in length. It is attractive on account of its pretty and varied colors. 



